package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.dishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private dishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    /**
     * 分类分页查询
     * @param categoryPageQueryDTO
     * @return
     */
    @Override
    public PageResult page(CategoryPageQueryDTO categoryPageQueryDTO) {
    PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());
    Page<Category>page=categoryMapper.pageSelect(categoryPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());

    }

    /**
     * 新增分类
     * @param categoryDTO
     */
    @Override
    public void add(CategoryDTO categoryDTO) {
        Category category=new Category();
        BeanUtils.copyProperties(categoryDTO, category);
        //分类状态默认为禁用状态0
        category.setStatus(StatusConstant.DISABLE);

        //设置创建时间、修改时间、创建人、修改人
        //已经统一赋值了（用aop切面）
//        category.setCreateTime(LocalDateTime.now());
//        category.setUpdateTime(LocalDateTime.now());
//        category.setCreateUser(BaseContext.getCurrentId());
//        category.setUpdateUser(BaseContext.getCurrentId());

        categoryMapper.add(category);
    }

    /**
     * 根据id查询分类
     * @param id
     * @return
     */
    @Override
    public Category selectId(Long id) {
        Category category= categoryMapper.selsctId(id);
        return category;
    }

    /**
     * 修改分类
     * @param categoryDTO
     */
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category=new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        //已经统一赋值了（用aop切面）
//        category.setUpdateTime(LocalDateTime.now());
//        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.update(category);
    }

    /**
     * 启动，禁用分类
     * @param status
     * @param id
     */
    @Override
    public void status(Integer status, Long id) {
        //update category set status=? where id=?
        Category category=new Category();
        category.setStatus(status);
        category.setId(id);
        //已经统一赋值了（用aop切面）
//        category.setUpdateTime(LocalDateTime.now());
//        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.update(category);
    }

    /**
     * 根据id删除分类
     * @param id
     */
    @Override
    public void delete(Long id) {
       //delete from category where id=?

        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Integer count = dishMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        count = setmealMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }


        categoryMapper.delete(id);
    }
    /**
     * 根据类型查询分类
     * @param type
     * @return
     */
    @Override
    public List<Category> typeSelect(Integer type) {
        return categoryMapper.typeSelect(type);
    }

}
